MMA legend Conor McGregor has found himself in hot water after crashing a UFC press conference injuring a fighter during his attack.

After UFC President Dana White announced McGregor wouldn’t be attending UFC 223 this weekend in Brooklyn, New York, the fighter decided to turn up anyway at the Barclays Centre this afternoon (April 5).

As the media day wrapped up, according to witnesses, McGregor crashed the conference with his entourage, attacking a bus, leaving UFC lightweight fighter Michael Chiesa reportedly injured during the onslaught.

Felice Herrig captured part of the ruckus caused behind the scenes when Conor McGregor and his team arrived. This is from her Instagram account pic.twitter.com/9R6T2eNNTs

No interim champ. When this fight is over, champion, one of these guys will be the champion.

The only person here who is losing a belt is Conor. Conor’s losing the belt, these two are fighting for the belt.

The interim belt that he had, those two [Nurmagomedov and Ferguson] were supposed to fight — doesn’t happen.

White also added how he anticipated McGregor would be back before the end of the year.

Those at the conference only managed to get a fleeting glimpse of McGregor as he was quickly escorted away.

However, he still had time to kick off in front of the fighters as they attempted to leave the venue to return to their nearby hotel.

On Twitter it’s claimed by reporter Ariel Helwani the bus McGregor attacked is Nurmagomedov’s – who was involved in an altercation with Artem Lobov earlier this week, McGregor’s training partner.

Conor McGregor and members of his team showed up at the Barclays Center at the very end of media day moments ago. There was an altercation with some of the departing fighters who are competing on the card.